Swimming has been contested at every Summer Paralympics. At the first games, the 1960 Paralympics, 62 swimming events were held in distances of 25 and 50 metres, plus a 3×50 metre relay for men. Since then, swimming at the Paralympics has grown to 140 events covering distances from 50 to 400 metres, plus 4×50 and 4×100 metre relays. Along with track and field athletics, it is one of the largest sports at the Paralympics in terms of the number of events, competitors, and spectators.

Para swimming is an adaptation of the sport of swimming for athletes with disabilities. Para swimmers compete at the Summer Paralympic Games and at other sports competitions throughout the world. The sport is governed by the International Paralympic Committee. Both men and women compete in para swimming, racing against competitors of their own gender. Swimming has been a part of the Paralympic program since the 1960 Summer Olympics in Rome, Italy.